Why am I being deducted so much money ("advance payments already made")?
Presumably you have received an advance or a down payment from the GVL in the past. Such advances are usually granted on revenues from the "rights transfer" area and could previously only be offset against revenues from this area.
However, we are now able to offset from both revenue sources. The advantage: Advances are reimbursed more quickly, so you receive remuneration from the GVL again more quickly.